事情发展到这种地步，我也感到无能为力。

Shìqing fāzhǎn dào zhè zhǒng dìbù, wǒ yě gǎndào wúnéngwéilì.

Now that things have come to this point, I also feel powerless.

看到朋友陷入抑郁，他很担心，却又觉得自己无能为力。

Kàndào péngyou xiànrù yìyù, tā hěn dānxīn, què yòu juéde zìjǐ wúnéngwéilì.

Seeing his friend fall into depression, he was very worried but felt powerless.

有些社会问题不是个人努力就能解决的，我们常常感到无能为力。

Yǒuxiē shèhuì wèntí bú shì gèrén nǔlì jiù néng jiějué de, wǒmen chángcháng gǎndào wúnéngwéilì.

Some social problems cannot be solved by individual effort alone, and we often feel powerless.